/*
 * Copyright 2002-2006 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.tigris.mappedlexer.io.implementation;

import org.tigris.mappedlexer.io.*;

/**
 * @author Sam Huang
 * 
 */
public class StringCharOutputSequence implements CharOutputSequence {

	protected StringBuffer buffer = null;

	public StringCharOutputSequence() {
		buffer = new StringBuffer();
	}

	public void append(char chr) {
		buffer.append(chr);
	}
	
	public char getChar(int index) {
		return buffer.charAt(index);
	}
	
	public int getLength() {
		return buffer.length();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see net.sourceforge.simplexer.io.StringStream#append(java.lang.String)
	 */
	public void append(String stream) {
		buffer.append(stream);
		// System.out.println(buffer.toString());
	}

	@Override
	public String toString() {
		return buffer.toString();
	}

	public void close() {
		buffer = null;
	}

	public void prepend(String stream) {
		StringBuffer temp = new StringBuffer(stream);
		temp.append(buffer);
		this.buffer = temp;
	}

	public void prepend(char chr) {
		StringBuffer temp = new StringBuffer(chr);
		temp.append(buffer);
		this.buffer = temp;
	}

}
